package com.example.merchantdemo.util;

import com.alibaba.fastjson.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeader;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.Iterator;
import java.util.Map;

/**
 * @author
 */
public class HttpClientUtil {

    private static final Logger log = LoggerFactory.getLogger(HttpClientUtil.class);

    /**
     * utf-8字符编码
     */
    public static final String CHARSET_UTF_8 = "utf-8";

    /**
     * HTTP内容类型
     */
    public static final String CONTENT_TYPE_TEXT_HTML = "text/xml";

    /**
     * HTTP内容类型。相当于form表单的形式，提交数据
     */
    public static final String CONTENT_TYPE_FORM_URL = "application/x-www-form-urlencoded";

    /**
     * HTTP内容类型。相当于form表单的形式，提交数据
     */
    public static final String CONTENT_TYPE_JSON_URL = "application/json;charset=utf-8";

    /**
     * 连接管理器
     */
    private static PoolingHttpClientConnectionManager pool;

    public static Integer CONTENT_TIME_OUT = 50000;

    /**
     * 请求配置
     */
    private static RequestConfig requestConfig;

    static {

        try {
            SSLContextBuilder builder = new SSLContextBuilder();
            builder.loadTrustMaterial(null, new TrustSelfSignedStrategy());
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                    builder.build());
            // 配置同时支持 HTTP 和 HTPPS
            Registry<ConnectionSocketFactory> socketFactoryRegistry =
                    RegistryBuilder.<ConnectionSocketFactory>create().register(
                    "http", PlainConnectionSocketFactory.getSocketFactory()).register(
                    "https", sslsf).build();
            // 初始化连接管理器
            pool = new PoolingHttpClientConnectionManager(
                    socketFactoryRegistry);
            // 将最大连接数增加到200，实际项目最好从配置文件中读取这个值
            pool.setMaxTotal(200);
            // 设置最大路由
            pool.setDefaultMaxPerRoute(2);
            // 根据默认超时限制初始化requestConfig
//            int socketTimeout = 10000;
//            int connectTimeout = 10000;
//            int connectionRequestTimeout = 10000;
//            requestConfig = RequestConfig.custom().setConnectionRequestTimeout(
//                    connectionRequestTimeout).setSocketTimeout(socketTimeout).setConnectTimeout(
//                    connectTimeout).build();

            //System.out.println("初始化HttpClientTest~~~结束");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyStoreException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        }


        // 设置请求超时时间
        requestConfig = RequestConfig.custom().setSocketTimeout(CONTENT_TIME_OUT).setConnectTimeout(CONTENT_TIME_OUT)
                .setConnectionRequestTimeout(CONTENT_TIME_OUT).build();
    }

    public static CloseableHttpClient getHttpClient() {

        CloseableHttpClient httpClient = HttpClients.custom()
                // 设置连接池管理
                .setConnectionManager(pool)
                // 设置请求配置
                .setDefaultRequestConfig(requestConfig)
                // 设置重试次数
                .setRetryHandler(new DefaultHttpRequestRetryHandler(0, false))
                .build();

        return httpClient;
    }

    /**
     * get
     *
     * @param host
     * @param path
     * @param method
     * @param headers
     * @param querys
     * @return
     * @throws Exception
     */
    public static String doGet(String host, String path, String method,
                               Map<String, String> headers,
                               Map<String, String> querys) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        // 响应内容
        String responseContent = null;
        try {
            httpClient = getHttpClient();
            HttpGet httpGet = new HttpGet(buildUrl(host, path, querys));
            for (Map.Entry<String, String> e : headers.entrySet()) {
                httpGet.addHeader(e.getKey(), e.getValue());
            }
            // 执行请求
            response = httpClient.execute(httpGet);
            // 得到响应实例
            HttpEntity entity = response.getEntity();
            // 判断响应状态
            if (response.getStatusLine().getStatusCode() >= 300) {
                throw new Exception(
                        "HTTP Request is not success, Response code is " + response.getStatusLine().getStatusCode());
            }

            if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
                responseContent = EntityUtils.toString(entity, CHARSET_UTF_8);
                EntityUtils.consume(entity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseContent;
    }

    private static String buildUrl(String host, String path, Map<String, String> querys) throws UnsupportedEncodingException {
        StringBuilder sbUrl = new StringBuilder();
        sbUrl.append(host);
        if (!StringUtils.isBlank(path)) {
            sbUrl.append(path);
        }
        if (null != querys) {
            StringBuilder sbQuery = new StringBuilder();
            for (Map.Entry<String, String> query : querys.entrySet()) {
                if (0 < sbQuery.length()) {
                    sbQuery.append("&");
                }
                if (StringUtils.isBlank(query.getKey()) && !StringUtils.isBlank(query.getValue())) {
                    sbQuery.append(query.getValue());
                }
                if (!StringUtils.isBlank(query.getKey())) {
                    sbQuery.append(query.getKey());
                    if (!StringUtils.isBlank(query.getValue())) {
                        sbQuery.append("=");
                        sbQuery.append(URLEncoder.encode(query.getValue(), "utf-8"));
                    }
                }
            }
            if (0 < sbQuery.length()) {
                sbUrl.append("?").append(sbQuery);
            }
        }
        return sbUrl.toString();
    }

    /**
     * 发送Post请求
     *
     * @param httpPost
     * @return
     */
    private static String sendHttpPost(HttpPost httpPost) {

        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        // 响应内容
        String responseContent = null;
        try {
            // 创建默认的httpClient实例.
            httpClient = getHttpClient();
            // 配置请求信息
            httpPost.setConfig(requestConfig);
            // 执行请求
            response = httpClient.execute(httpPost);
            // 得到响应实例
            HttpEntity entity = response.getEntity();

            // 可以获得响应头
            // Header[] headers = response.getHeaders(HttpHeaders.CONTENT_TYPE);
            // for (Header header : headers) {
            // System.out.println(header.getName());
            // }

            // 得到响应类型
            // System.out.println(ContentType.getOrDefault(response.getEntity()).getMimeType());

            // 判断响应状态
            if (response.getStatusLine().getStatusCode() >= 300) {
                throw new Exception(
                        "HTTP Request is not success, Response code is " + response.getStatusLine().getStatusCode());
            }

            if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
                responseContent = EntityUtils.toString(entity, CHARSET_UTF_8);
                EntityUtils.consume(entity);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        log.info("返回值 : {}", responseContent.trim());
        return responseContent;
    }

    /**
     * 发送Get请求
     *
     * @param httpGet
     * @return
     */
    private static String sendHttpGet(HttpGet httpGet) {

        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        // 响应内容
        String responseContent = null;
        try {
            // 创建默认的httpClient实例.
            httpClient = getHttpClient();
            // 配置请求信息
            httpGet.setConfig(requestConfig);
            // 执行请求
            response = httpClient.execute(httpGet);
            // 得到响应实例
            HttpEntity entity = response.getEntity();

            // 可以获得响应头
            // Header[] headers = response.getHeaders(HttpHeaders.CONTENT_TYPE);
            // for (Header header : headers) {
            // System.out.println(header.getName());
            // }

            // 得到响应类型
            // System.out.println(ContentType.getOrDefault(response.getEntity()).getMimeType());

            // 判断响应状态
            if (response.getStatusLine().getStatusCode() >= 300) {
                throw new Exception(
                        "HTTP Request is not success, Response code is " + response.getStatusLine().getStatusCode());
            }

            if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
                responseContent = EntityUtils.toString(entity, CHARSET_UTF_8);
                EntityUtils.consume(entity);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseContent;
    }


    /**
     * 发送 post请求
     *
     * @param httpUrl 地址
     */
    public static String sendHttpPost(String httpUrl) {
        // 创建httpPost
        HttpPost httpPost = new HttpPost(httpUrl);
        return sendHttpPost(httpPost);
    }

    /**
     * 发送 get请求
     *
     * @param httpUrl
     */
    public static String sendHttpGet(String httpUrl) {
        // 创建get请求
        HttpGet httpGet = new HttpGet(httpUrl);
        return sendHttpGet(httpGet);
    }

    /**
     * 发送 post请求
     *
     * @param httpUrl 地址
     * @param params  参数(格式:key1=value1&key2=value2)
     */
    public static String sendHttpPost(String httpUrl, String params) {
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            // 设置参数
            if (params != null && params.trim().length() > 0) {
                StringEntity stringEntity = new StringEntity(params, "UTF-8");
                stringEntity.setContentType(CONTENT_TYPE_FORM_URL);
                httpPost.setEntity(stringEntity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }


    /**
     * @param map
     * @date 2018-08-09 15:57:26
     * @since 发送 post请求,参数(格式:key1=value1&key2=value2)
     */
    public static String sendhttpPost(String httpUrl, Map<String, Object> map) {
        String param = map.toString().substring(1, map.toString().length() - 1).replaceAll("\\s*", "").replaceAll(","
                , "&");
        return sendHttpPost(httpUrl, param);
    }

    /**
     * 发送 post请求
     *
     * @param maps 参数
     */
    public static String sendHttpPost(String httpUrl, Map<String, String> maps) {
        String parem = convertStringParamter(maps);
        return sendHttpPost(httpUrl, parem);
    }

    /**
     * 发送 post请求 发送json数据
     *
     * @param httpUrl   地址
     * @param headers   请求头
     * @param bodys 参数
     */
    public static String sendHttpPostJson(String httpUrl, Map<String, String> headers, Map<String, Object> bodys) {
        log.debug("发送post请求入参: " + "url:" + httpUrl + " 请求头:" + headers +  " 参数:" + bodys);
        StringBuffer sb = new StringBuffer();
        httpUrl = httpUrl + sb.toString();
        log.debug("拼接后url：" + httpUrl);
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            // 设置参数
            if (bodys != null && !bodys.isEmpty()) {
                StringEntity stringEntity = new StringEntity(JSONObject.toJSONString(bodys), "UTF-8");
                stringEntity.setContentType(CONTENT_TYPE_JSON_URL);
                if (headers != null && !headers.isEmpty()) {
                    for (String key : headers.keySet()) {
                        Header header = new BasicHeader(key, headers.get(key));
                        httpPost.setHeader(header);
                    }
                }
                httpPost.setEntity(stringEntity);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }

    /**
     * 发送 post请求 发送json数据
     *
     * @param httpUrl    地址
     * @param paramsJson 参数(格式 json)
     */
    public static String sendHttpPostJson(String httpUrl, Map<String, String> headers, Map<String, String> querys,
                                          String paramsJson) {
        log.debug("发送post请求入参: " + "url:" + httpUrl + " headers:" + headers + " querys:" + querys + " body体json串:" + paramsJson);
        StringBuffer sb = new StringBuffer();
        for (String key : querys.keySet()) {
            sb.append(key + "=");
            if (!org.springframework.util.StringUtils.isEmpty(querys.get(key))) {
                sb.append(querys.get(key) + "&");
            }
        }
        if (sb.toString().endsWith("&")) {
            sb = sb.deleteCharAt(sb.length() - 1);
        }
        if (!querys.isEmpty()) {
            httpUrl = httpUrl + "?";
        }
        httpUrl = httpUrl + sb.toString();
        log.debug("拼接后url：" + httpUrl);
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            // 设置参数
            if (paramsJson != null && paramsJson.trim().length() > 0) {
                StringEntity stringEntity = new StringEntity(paramsJson, "UTF-8");
                stringEntity.setContentType(CONTENT_TYPE_JSON_URL);
                for (String key : headers.keySet()) {
                    Header header = new BasicHeader(key, headers.get(key));
                    httpPost.setHeader(header);
                }
                httpPost.setEntity(stringEntity);

            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }

    /**
     * 发送 post请求 发送xml数据
     *
     * @param httpUrl   地址
     * @param paramsXml 参数(格式 Xml)
     */
    public static String sendHttpPostXml(String httpUrl, String paramsXml) {
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            // 设置参数
            if (paramsXml != null && paramsXml.trim().length() > 0) {
                StringEntity stringEntity = new StringEntity(paramsXml, "UTF-8");
                stringEntity.setContentType(CONTENT_TYPE_TEXT_HTML);
                httpPost.setEntity(stringEntity);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }


    /**
     * 将map集合的键值对转化成：key1=value1&key2=value2 的形式
     *
     * @param parameterMap 需要转化的键值对集合
     * @return 字符串
     */
    public static String convertStringParamter(Map parameterMap) {
        StringBuffer parameterBuffer = new StringBuffer();
        if (parameterMap != null) {
            Iterator iterator = parameterMap.keySet().iterator();
            String key = null;
            String value = null;
            while (iterator.hasNext()) {
                key = (String) iterator.next();
                if (parameterMap.get(key) != null) {
                    value = (String) parameterMap.get(key);
                } else {
                    value = "";
                }
                parameterBuffer.append(key).append("=").append(value);
                if (iterator.hasNext()) {
                    parameterBuffer.append("&");
                }
            }
        }
        return parameterBuffer.toString();
    }

    /**
     * 交易平台get参数格式化
     *
     * @param params
     * @return
     */
    private static String formatGetParams(Map<String, Object> params) {
        StringBuilder format = new StringBuilder();
        format.append('?');

        for (String key : params.keySet()) {
            Object value = params.get(key);
            if (format.length() > 1) {
                format.append("&" + key + "=" + value.toString());
            } else {
                format.append(key + "=" + value.toString());
            }
        }
        return format.toString();
    }


    public static Integer getContentTimeOut() {
        return CONTENT_TIME_OUT;
    }

    public static void setContentTimeOut(Integer contentTimeOut) {
        CONTENT_TIME_OUT = contentTimeOut;
    }


    public static String sendHttpPostJsonGroups(String httpUrl, String paramsJson) {
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            // 设置参数
            if (paramsJson != null && paramsJson.trim().length() > 0) {
                StringEntity stringEntity = new StringEntity(paramsJson, "UTF-8");
                stringEntity.setContentType(CONTENT_TYPE_JSON_URL);
                httpPost.setEntity(stringEntity);
                //Token
                httpPost.setHeader("Authorization", "Bearer " +
                        "YWMtJBVMTJodEei00AusJXM6jAAAAAAAAAAAAAAAAAAAAAHxAxBATfsR6JSJW37xEyiIAgMAAAFlE4jSOgBPGgC_66l7_88o-76fyEE1J-2q81wCA20fKXFcZz1OQItWmg");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }

}